Patent US4112624A successfully refreshed from Google Patents.
US4112624A
Expired / Lapsed
US
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Grinding machine
Assignee: Cincinnati Milacron Heald Corp
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Filing: 1977-07-18
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Granted: 1978-09-12
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Expires: 1997-07-18
Abstract
Abstract Grinding machine having annular dressing wheel whose inner surface is used for dressing.
Inventors
- 👤 Herbert R. Uhtenwoldt
- 👤 Norman S. Humes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:19
CPC Classifications
B; B24; B24B; B24B53/00; B24B53/12; B24B53/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
223 words
Grinding machine for finishing a bore in a tubular workpiece, comprising: (a) a base, (b) a wheelhead mounted on the base and having a rotatable spindle with an abrasive wheel, (c) a workhead mounted on the base, said workhead including an annular platen which rotates and engages one end of the workpiece, and including shoes which engage the outer surface of the workpiece, (d) an annular workpiece clamp mounted on the base for rotation about an axis parallel to the axis of said workpiece bore and which engages the other end of the workpiece, the workpiece clamp having a circular aperture through which the abrasive wheel advances axially during parts of the grinding cycle, (e) a dressing wheel in the form of an annulus mounted on the workpiece clamp with its inner dressing surface protruding into the aperture and located in a general plane extending transversely of the spindle axis, the inner dressing surface of the annulus having a diameter substantially larger than the external diameter of the abrasive wheel, the dressing wheel being mounted for rotation with the clamp about the major axis of the annulus, and (f) means producing relative movement between the wheelhead and the dressing wheel to bring about dressing engagement between the said inner surface of the dressing wheel and the said external surface of the abrasive wheel.
Claim 2
Dependent Claim
223 words
Grinding machine for finishing a bore in a tubular workpiece, comprising: (a) a base, (b) a wheelhead mounted on the base and having a rotatable spindle with an abrasive wheel, (c) a workhead mounted on the base, said workhead including an annular platen which rotates and engages one end of the workpiece, and including shoes which engage the outer surface of the workpiece, (d) an annular workpiece clamp mounted on the base for rotation about an axis parallel to the axis of said workpiece bore and which engages the other end of the workpiece, the workpiece clamp having a circular aperture through which the abrasive wheel advances axially during parts of the grinding cycle, (e) a dressing wheel in the form of an annulus mounted on the workpiece clamp with its inner dressing surface protruding into the aperture and located in a general plane extending transversely of the spindle axis, the inner dressing surface of the annulus having a diameter substantially larger than the external diameter of the abrasive wheel, the dressing wheel being mounted for rotation with the clamp about the major axis of the annulus, and (f) means producing relative movement between the wheelhead and the dressing wheel to bring about dressing engagement between the said inner surface of the dressing wheel and the said external surface of the abrasive wheel.
Claim 3
Dependent Claim
30 words
Grinding machine as recited in claim 1, wherein the dressing wheel is in the form of a metal ring on the inner surface of which is mounted an abrasive ring.
Claim 4
Dependent Claim
38 words
Grinding machine as recited in claim 2, wherein the spindle is mounted in the wheelhead in cantilevered fashion for internal grinding, and wherein the abrasive ring is in the form of a matrix in which diamonds are embedded.
Claim 5
Dependent Claim
57 words
Grinding machine as recited in claim 3, wherein the means serves to move the abrasive wheel relative to the workpiece, so that a dressing portion of the grinding cycle consists of a retraction movement, a run-out movement, a compensation movement, and a run-in movement during which the abrasive wheel engages the abrasive ring for dressing the wheel.
Claim 6
Dependent Claim
46 words
Grinding machine as recited in claim 1, wherein the workpiece clamp has a hardened metal annular nose that is concentric with the aperture and extends axially of the plate for engagement with the end of the workpiece, the dressing wheel being located close to the nose.
Claim 7
Dependent Claim
31 words
Grinding machine as recited in claim 1, wherein the plane of the dressing wheel is close to the said other end of the workpiece, so that the dressing cycle is short.
Claim 8
Dependent Claim
207 words
Grinding machine for finishing a bore in a tubular workpiece, comprising: (a) a base, (b) a wheelhead mounted on the base and having a rotatable spindle with an abrasive wheel, (c) a workhead mounted on the base, said workhead including means which engages to workpiece and rotates it and including shoes which engage the outer surface of the workpiece, (d) a support body fixedly mounted on the base, the support body having a circular aperture through which the abrasive wheel advances axially during parts of the grinding cycle, (e) a dressing wheel in the form of a rigid annulus mounted on the support body with its inner dressing surface protruding into the aperture and located in a general plane extending transversely of the spindle axis, the inner dressing surface of the annulus having a diameter substantially larger than the external diameter of the abrasive wheel, the dressing wheel being mounted in bearings in the support body aperture for rotation independently of the wheelhead about the major axis of the annulus, and (f) feed means producing relative movement between the wheelhead and the dressing wheel to bring about dressing engagement between the said inner surface of the dressing wheel and the said external surface of the abrasive wheel.
Claim 9
Dependent Claim
207 words
Grinding machine for finishing a bore in a tubular workpiece, comprising: (a) a base, (b) a wheelhead mounted on the base and having a rotatable spindle with an abrasive wheel, (c) a workhead mounted on the base, said workhead including means which engages to workpiece and rotates it and including shoes which engage the outer surface of the workpiece, (d) a support body fixedly mounted on the base, the support body having a circular aperture through which the abrasive wheel advances axially during parts of the grinding cycle, (e) a dressing wheel in the form of a rigid annulus mounted on the support body with its inner dressing surface protruding into the aperture and located in a general plane extending transversely of the spindle axis, the inner dressing surface of the annulus having a diameter substantially larger than the external diameter of the abrasive wheel, the dressing wheel being mounted in bearings in the support body aperture for rotation independently of the wheelhead about the major axis of the annulus, and (f) feed means producing relative movement between the wheelhead and the dressing wheel to bring about dressing engagement between the said inner surface of the dressing wheel and the said external surface of the abrasive wheel.
Claim 10
Dependent Claim
30 words
Grinding machine as recited in claim 7, wherein the dressing wheel is in the form of a metal ring on the inner surface of which is mounted an abrasive ring.
Claim 11
Dependent Claim
38 words
Grinding machine as recited in claim 8, wherein the spindle is mounted in the wheelhead in cantilevered fashion for internal grinding, and wherein the abrasive ring is in the form of a matrix in which diamonds are embedded.
Claim 12
Dependent Claim
58 words
Grinding machine as recited in claim 9, wherein the feed means serves to move the abrasive wheel relative to the workpiece, so that a dressing portion of the grinding cycle consists of a retraction movement, a run-out movement, a compensation movement, and a run-in movement during which the abrasive wheel engages the abrasive ring for dressing the wheel.
Claim 13
Dependent Claim
54 words
Grinding machine as recited in claim 7, wherein the support body is also provided with a workpiece clamp has a hardened metal annular nose that is concentric with the aperture and extends axially of the plate for engagement with the outer end of the workpiece, the dressing wheel being located close to the nose.
Claim 14
Dependent Claim
31 words
Grinding machine as recited in claim 7, wherein the plane of the dressing wheel is close to the said outer end of the workpiece, so that the dressing cycle is short.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |